Clamp for holding coverings on rolls.



n PATENTBD 00T. 2, 1906.

H. F. SHELDON.l

`CLAMP FOR HOLDING COVERINGS 0N ROLLS.

' APPLICATION FILED DEO. 6. 1905.

- the roll.

UNITED STATES PATENT OFFICE.

HERBERT F. SIIELDON, OF BOSTON, MASSACHUSETTS` ASSIGNOR OF ONE-FOURTH TO THOMAS F. MAGUIRE, OF EAST WALPOLE,

MASSACHUSETTS.

Specification of Letters Patent.

Patented Oct. 2'; 1906.

Application iled"December 6, 1905. Serial N0. 290,516.

To all whom it may concern,.-`

Beit known that I, HERBERT F. SHELDON, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Clamps for Holding Coverings on Rolls, of which the -following description, in connection with the accompanying drawings, is a specification, like numerals on the drawings representing like parts.

This invention has for its object to provide a novel clamp for holding a covering on a roll, and it is of such a nat-ure that it may be used for holding the .wire gauze on a cylinder or dandy-roll of a paper-making machine or for holding a covering having an abrasive surface on a polishing or bulling roll or for holding any kind of a covering on any other kind of a roll.

My device is entirely separate from the roll with which it is used and comprises two clamping-jaws, which are received within a longitudinal groove formed in the surface of the roll, and between which jaws the inturned edges of the covering may be inserted, and means within said groove and located between the jaws for closing the latter onto the inturned edges of the covering. In the preferred embodiment of my invention these jaws extend the full length of the roll and are closed together by means of a clamping-rod which is received between the inner edges of the jaws and which is cam-shaped in crosssection. The jaws are pivoted together between their inner edges and the clamping edges, so that by turning the rod in one direction or the other the jaws are swung about their pivotal points to bring the clamping ed es together. f

willdescribe first one embodiment of my invention and then point out the novel features thereof in the appended claims.

In the drawings, Figure 1 is a perspective view of a roll having my invention applied thereto. Fig. 2 is an enlarged end view of Fig. 3 is an enlarged cross-sectional view of the clamping-jaws, showing them open. Fig. 4 is a similar view showing the clamping-jaws closed, and Fig. 5 1s a side view of a portion of the jaws.

3 designates a roll of any suitable character to which my invention is applied. This roll may be either the cylinder of a'paperemaking machine ora buiing-roll or any oth'er roll to which it is desired to apply an outer covering The coverin f is designated by 4. It is held to the roll by having its inturned edges 5 clamped between the jaws of my improved clamping device. This clamping device comprises two clamping-jaws and 7, which are herein shown as pivoted together, as at 8, and which are received within a groove 9, extending longitudinally of the roll. The clamping-jaws are closed together by means of a 'cam member, which is herein shown as a rod 10, extending longitudinally of the clamping-j aws and received between the inner edge 11 thereof. This rod is oblong in cross-soction, as seen best infFigs. 3 and 4, so that when it is in the position shown in Fig. 3 the .inner edges of thel jaws may move together, thereby opening the aws to receive the inturned edges 5 of the covering 4. The jaws are closed together, thereby to clamp the covering to the roll by giving the rod 10 a one-quarter turn, as shown in Fig. 4C. This turning of the rod 10 may be accomplished in any suitable Way, but preferably said rod is provided at one end with a projection or handle 13, by means of which it may be turned.

' The rod 10 is loosely carried by the clamping-jaws, and it may be removed entirely therefrom by withdrawing it longitudinally thereof. When the rod 10 is turned to close the jaws together, the handle 13 thereof enters in one of two notches 1 4, and thereby locks said rod from longitudinal movement.

I pro ose to make the clamping-j aws 6 and 7 and t e cam for closing them entirely separate from the roll 6. (Shown in Figs. 3 and 5.) The clampin -jaws are loosely received 1n the groove 9 an may be readily removed from the groove orreplaced therein. If, therefore, any clam ing-j aw becomes injured or broken, a pair o Ijaws may be removed from the groove in which they are received and a separate pair inserted therein without the necessity of discarding the entire roll, as would be the case if .the clamping-j aws were an integral part of the roll. Another feature of I ny 1nvention which I regard as important 1s that the clamping edges of the clamping-j aws come flush with the surface of the roll, and therefore when they are closed against the inturned IOO edges oit the covering the port-ion of the cover` l inesl. for cylinder ot e or the sandp linden i he necessary Uo'fe 9 {Jul}1 and im ,tred within said itnrned edges of the ore ering in r see-tif" rfrhty ot clamping me.

and inthiscase aphiners 'mil oe eniphlyed -eafh leveled within :i groove in the roll and each operating to clamp the adjacent edges el the. adjacent sections ot the covering.

ln Fig. 1 .l have sln'iwn the covering 2 ot the roll in tour sections and to properly clamp these sections to the roll it is necessary to provide four clamping members each located in a groove Q.

The drawings illustrate and the specification describes one embodiment only of my invention.

Having described my invention, what claim as new, and desire to secure by Let ters Patent, isF

l. A roll or cylinder provided with a longitudinai groove, combined with a pair of clamping-j aws removably located within said groove, and means within the groove `to close the jaws together.

2. A roll or cylinder provided with a longitudinal groove, a pair of pivoted clampingjaws separate from the roll and located within said groove, and means to close the jaws together.

3. A roll or cylinder provided with a longitudinal groove and a pair of clamping-jaws pivoted together and located within said r the rolls, whether it be 'I fetween the clampy their Clamping edges, and a rod oblong in seams groove, the gripping edges of' said jaws being flush with the surface of the roll.

4L. A roll or cylinder provided with a longitndinal groove, a pair of clamping-jaws in said groove, said clamping-jaws being pivoted together between their inner edges and their clamping edges, and a cani member confined between the jaws .for elamping them together.

A roll or cylinder provided with a longi tudinal groove, a pair ot clampingjaws in saidv groove, said clamping-jaws being pivoted together between their inner edges and cross-section:located between the inner edges of the jaws tor lclosing them together.

6. A roll or cylinder provided with a longitudinal groove, a pair or' clamping-jaws in said groove, said clainpirig-jaws Being pivoted together between their inner edges and their clamping edges, and a rod oblong in cross-section located between the inner edges of the jaws for closin g them together, said rod being removable from the aws.

7. A roll or cylinder provided with a longitndinal groove, a pair of clamping-j aws pivoted together and loosely received within said groove, and a cam member'conined between the jaws Jfor clamping them together 'said clamping-jaws and cam member being independent from the roll.

8. A roll or cylinder provided on its periphery with a longitudinal groove and a pair of clamping-j aws separate from the cylinder and located within the groove, the gripping edges of said jaws being Hush with thesilrface of the roll. ,f

1n testimony whereof I have signed my name to'this specification in the presence of two'subscribing witnesses.

HERBERT F. SHELDON.

Witnesses:

LOUIS C. SMITH, ELIZABETH R. MORRISON. 

